Safety bazob



H. GAISMAN Jan. 14, 1930. SAFETY RAzoR Re. 17,567

2 Sheets-She -1- Original Filed Oct. 6. 1923 -"1 y J INVENTOR filmy J/za/sman #YJATTORNEY H. J. GAISMAN SAFETY RAZOR Jan. 14, 1930. Re. i 7,56 7

Original Filed Oct. 6. 1925 2 sheets-sheet 2 IN VEN TOR ATTORNEY Reina ed Jan. 14, 1930 UNITED STATES PATENT olrlca HENRY J. GAISMA N, OF NEW YORK, N. Y., ASSIGNOR '10 AUTO-STBOP SAFETY RAZOR CO., INC., OF NEW YORK, N. Y.', CORPORATION OI NEW YORK SAFETY mzon Original No. 1,858,435, dated February 7, 1928, Serial No. 866,909, filed October 8, 1923. .-Application for reiuue filed November 19,

6 in shaving relation to the guard teeth. -Here-' tofore, so far as I am aware, in the class of razors above referred to the backing was provided with cylindrical studs spaced a art to enter corresponding apertures in the b ade 1o andin the guard plate or member, and a handle attached to said backing clam ed the blade between the guard plate or mem er and the backing. The apertures in the blades 'for said studs have been considerably larger than the studs, providing ready assembling of the parts whereby the blade has been somewhat loose on the studs, hence the blade has been permitted freedom upon the guard in adjusting the parts.

An object of my invention is to provide new and improved means between the studs of the backing and the apertures, in the blade in such a manner that the studs will co-operate with the blade to resist relative movement of the blade with respect to the guard so that the blade will be properly positioned respecting the guard at all times when the parts are clamped together.

A further feature of my invention is that by reason of the arrangement'of the apertures in the blade, strain through the center of the -blade is relieved when the blade is being clamped between the guard member and the backing member to reduce danger of the blade cracking or splitting in a lengthwise direction, while being bent or under tension.

My invention also comprises novel details of improvement that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had tothe accompanying drawings forming a part hereof, wherein Figure 1 is a sectional view illustrating the parts of my improved razor assembled;

Fi 2 is a detail plan view of the guard mem er;

Fig. 3 is a section on line 3, 3, ofFig. 2;

Fig. 4 is an inverted plan view of the I backing;

Fig. 5 is a detail of the blade,

curved surfaces 3 of thestuds.

1929. Serial No. 408,898. v

Fig. 6 is a sectional view illustrating a modified form of the razor assembled;

Fig. 7 is a top view of the guard member of Fig. 6;

Fig. 8 is an underside view of member of Fi 6; a

Fig. 9 is a p an view of the blade of Fig. 6.

Similar numerals of reference indicate correspondingparts in the several views.

The numeral 1 indicates avguard member provided'with suitable guard teeth 1 at its opposite edges and having holes 2 to receive studs 3 extending from backing member or plate 4, the studs also being adapted to pass through apertures in the blade 5 when the latter is in shaving position upon guard member the backin g 1. The backin 4 is shown provided with a circular in cross-section and the blade apertures 5 having corresponding contour. In the examples illustrated in Figs. 1 to ithe studs 3 and blade apertures 5 are shown substantially rectangular in general contour. while in Figs. 6 to 9 the studs 3 have curved or circularly disposed surfaces at 3 on 01)- posite sides, and the blade apertures 5 have correspondingly curved or circularly disposed opposing edges 5 opposed ,to the The studs 3 and the blade apertures have corresponding complemental offsets shown as projecting and re-entrant portions to co-operate with one another; In Figs. 1, 4, 6 and 8 the studs 3 have longitudinally disposed re-entrant oil'- sets, shown as recesses or grooves 3 that receive corresponding ofi'sets shown as proiec'- tions 5 in the .blade apertures 5 as in Figs. 5 and 9.

The offsets of the studs and blades are complementary to one another and set sufficiently snugly together toretain the blade in proper relation to the studs 3 to secure the blade iu'required position on the guard member with respect to its teeth. lVhen' the parts are assembled and the projections are in the recesses the blade is retained from longitudinal: movement along the guard and by engagement of the inner opposing edges of the projections and the corresponding bottoms of the recesses rotation of the blade is prevented so that the blade edges are maintained in proper relation along the guard teeth.

By means of my improvements I obtain the advantage of so relating the several opertures in the blade and giving them such transverse dimensions between the cutting edges of the blade throu h the interior thereof, that when the blade is ent between the clamping members 1 and 4 danger'of breaking or cracking the blade through its longitudinal central portion is relieved.

An advantage of my improved construction is that although the blades and studs described are particularly adapted to operate together for the purpose specified, the spac' ing between the opposing projections 5 of blade a ertures 5 may be such as to receive the stu s of backings of the type of Gillette safety razors on the market. Having reference to Fig. 5, it will be noted that, in order to receive the studs of backings of the Gillette t pe, the blade apertures 5 are so designed tiiat the bounding figure of thetransverse cross-section of a cylindrical stud, that isva circle, may be inscribed in the same. The

same is true of the blade shown in Fig. 9 of the drawings. Putting it other words, the stud receiving apertures 5 are so designed that the oppositely projecting spaced edges thereof are disposed in relation to one another in such a manner that they are adapted to contact with a non-cylindrical stud at points which are equidistantly s aced from the longitudinal axis of the said stud at a dis tance corresponding to the diameter of a cylindrical stud, that is at, points which are tantly spaced from one of the axes "ounding figure ofthe transverse crosssec'tion of said non-cylindrical stud.

Having now described my invention, what I claim is j 1. A safetyrazor comprising a-backing, a razor blade adapted tobe held on the backing saidblade having positioning stud recelving apertures, the blade material outlining each aperture including two positioning stud engaging edges opposite each other and side edges, said stud engaging ed es being disposed between said side e ges and equidistantly spaced from a line parallel with the cutting edge of the blade, said apertures each being elongated at right angles to the cutting edge and transversely of the blade at a. side of each of the said positioning stud engaging edges, positioning studs on the,

backing'of a shape complemental to the shape lade material outlining'each aperture having of the aforesaid apertures in the blade, a guard member ,having spaced holes to receive the positioning studs, and means for retaining the backing, blade and guard in opposite each other and equidistantly spaced. from a line parallel with the cutting edge of the blade, the said apertures being elongated transversely of the blade on each side of said positioning stud engaging edges, positioning studs on the backing for entering the aforesaid apertures of the blade, said positioning studs having a cross sectional configuration corresponding to the outline of the edges of the apertures in the blade whereby the said positioning studs fit in the apertures of the lads, a guard having apertures to receive the positioning studs, and means for holding the backing, blade and guard in assembled relation to one another.

3. A safety razor blade having positioning stud receiving apertures, the blade material outlining each aperture having two positioning stud en aging edges projecting transversely of t e blade toward each other, the said oppositely projecting edges being adapted to engage round positioning studs, and each of the said apertures as a whole being adapted to receive positioning studs of a cow figuration complemental to the configuration of the apertures. Y

4. A blade for safety razors provided with stud receiving apertures, the blade material outlining each aperture having two cylindrical-stud engaging projections whose ends are opposite each other, said apertures being elongated transversely of" the blade on each side of the said stud engaging ends to receive studs of shapes complemental to the shapes ofthe apertures.

5. A blade for safety razors provided with positioning stud receivin apertures in line arallel with the cutting edge of the blade, the

two cylindrical-stud engaging ends projectin transversely of the bladetowar'd each ot er, said apertures being elongated transversely of the blade on each side of the stud engaging edges to receive positioning studs of shapes complemental to the shapes of the apertures, the elongations of the said apertures in relation to each other as set forth increasing the normal flexibility of the metal blade in the area in lines between and parallel with the outer margins of the apertures in a giraction parallel with the cutting edge of the a e. 6. A safety razor blade having ositioning stud receivin apertures, the bla e material outlining eac aperture having two cylindrical-stud engaging projections and side edges,

outlining each aperture having two cylindrical-stud engaging'projections and side edges, said projections extending transversely of the blade toward each other between said side edges and being equidistantly s aced from a hne parallel with the edges 0 the blade, one of which is the cutting edge, said apertures each being elongated at right angles to the cuttin edge and transversely of the blade at a si e of each of said stud engaging edges to receive positioning'studs of a shape complemental to the shape of the apertures, the elon ations of said apertures in. the relation set forth increasing the normal flexibility of the metal blade in the area in lines between and parallel with the outer margins of the apertures the blade.

8. A blade for safety razors provided-with a handle-connection receiving aperture and positioning stud receivin apertures on each side thereof and alining t erewith, the blade material outlining each of the last mentioned apertures having two cylindrical-stud engaging rojections extending transversely of the blade! toward each other, said apertures being elongated transversely of the blade on each side ofa stud engaging rojection to receive a positioning stud of a s ape complemental to the shape of the apertures.

9. A safety razor blade having spaced positioning stud receiving apertures, the blade material outlining each aperture including spaced 0 positely projecting edges and oppositely ocated recesses,'said edges adapted.

' to engage cylindrical positioning studs, the

a 'ertures being adapted to receive ortions o non-cylindrical positioning studs etween said edges and each of said recesses adapted to receive a ortion of a non-cylindrical stud.

10. Asa ety razor blade for use with cylindrical or non-c. lindrical position ng studs, said blade having s aced ositioning stud receivin apertures, t e bla e material outlining eadh aperture having oppositely projecting edges adapting the aperture to engage a cylindrical positioning stud or a portion of a non-cylindrical positioning stud.

11. A blade for safet razors for use with cylindrical or non-cy indricalypositioning studs said blade being provided with noncircu ar positioning stud receiving apertures, the blade material outlining each aperture parallelwith the cutting edges of having two oppositely extending stud engaging edges, and each aperture being elongated 12. A blade for safety razors provided with positioning stud receiving apertures, the blade material outlining each aperture having two oppositely extending sections with positioning stud engaging edges and each aperture having an area larger than that of a portion of a the stud engagin sections and adapted to re ceive portions 0% said positioning stud not engaged by said sections.

13. A safety razor including a blade holder, two spacedvblade positioning studs on said holder, the transversecross-section of each stud being non-circular and its bounding figure being of a configuration that a circle is adaptedto be inscribed therein, and a blade having spaced positioning stud receivin apertures, the blade materlal outlining each o said apertures havin spaced oppositely projecting edges adapte to contact with the respective positioning stud or with a cylindrical positioning stud at points at which the said inscribed circle contacts with the bounding figure of the transverse cross-section of said non-cylindrical ositioning stud.

holder, two spaced non-cylindrical blade positioning studs on said holder, and a blade aving spaced positioning stud receiving apertures, the blade material outlining each 0 said apertures having oppositely projecting spaced edges adapted to contact with its respective positioning stud or with a cylindrical positioning stud at points which are equidistantly spaced from the longitudinal axis of said non-cylindrical positioning stud.

15. A safety razor includin a blade holder,

two spaced non-cylindrical bFade positioning studs on said holder, and a blade having spaced positioning stud receiving apertures, the blade material outlining each of said apertures having oppositely projecting spaced edges adapted to contact with its respective positioning stud or with a cylindrical stud at points which are equidistantly spaced from one of the axes of the transverse cross-section of said non-cylindrical positioning stud.

16. A- razor blade having a plurality of apertured portions, said portions adapted to receive positioning studs of varying outline, projections on ,said blade extending from said blade into said apertures, said projections having opposed ends, said ends adapted to engage a positioning stud, each of said apertured portions having redesses at the sides of the projections, said recesses adapted to receive one or moreportions of non-cylindrical studs whereby sate. apertured portions positioning stud engageable by 14. A safety razor inc uding a bladeare adapted to engage opposed portionsof studs and-thereby. prevent shifting. of the blade relative to the studs. v

17. A razor bladehaving a central apertured portion andanend apertured portion,

said end portion adapted to receivea positioning stud which may be ofvary ng contour or outline, projections on said end portion extending therefrom into the aperture thereof, said pro ect1onshav1ng opposed ends,- said ends'ada'pted to engage a stud, said blade also liavingrecesses at the sides of saidprojections, 'said recesses adaptedto receive one. or.

'fniore' portions of a non-cylindrical stud, [whereby saidapertured portion is adapted .to

engage opposed portions of said stud and thereby prevent shifting of the blade relative I to the stud.

"18. A-safety razor blade having a clamp:

stud receiving aperture, the blade material ing-screw receiving hole and a positioning outlining said aperture including spacedope positely projecting edgesand oppositely located recesses, said edges adapted to engage a cylindrical positioning stud, the aperture being adapted to receive a portion of a non cylindrical positioning stud between said shifting of said vblade with reference to said stud, said recesses adapted to receive one or more portions oif said non-cylindrical stud.

23. A safety razor blade having a clamping-screw receiving hole and a positionin stud receiving aperture, the blade materia said aperture including opposed.

outlinin 7 sets of iverging edges and spaced recesses, said apertureada ted to engage a cylindrical stud or a non-cry indrical stud, andtherebyprevent shifting'of said blade with reference to. said stud, said recesses adapted to receive one'or more portions of said non-cylindrical stud.

, Signed at New York, in the county'of New York and State of New York, this 18th day of November, 1929.

HENRY J. GAISMAN.

edges and each of said recesses adaptedto receive a portion of a non-cylindrical, stud.

19. A safety razor blade having positioning stud receiving apertures, the blade material outlining each aperture including regularly spaced projecting edges and regular,

ly spaced recesses, gage cylindrical studs, and thereby prevent shifting of said blade with reference to said studs, saidrecesse's adapted 'to receive one or cylindrical stu more portions of non-cylindrical studs. f

20., A safety razor blade having positionsaid edges adapted to ening stud receiving apertures, the blade material outlining each aperture including spaced projecting edges and spaced recesses, said edges adapted to; engage cylindrical studs,

and thereby prevent shifting of said: blade with reference to said studs, said recesses adapted to receive one or more portions of non-cylindrical studs,

- 21. A saftey razor blade having a clamping-screw receiving hole and a positioning stud receiving aperture, the blade material outlining said aperture including regularly spaced projecting edges and regularly spaced recesses, said a erture adapted to engage a and thereby prevent shiftin of saidqblade with reference to said stu said recesses ora non-cylindrical stud, f

adapted to receiveoneormore portions of 7 said non-cylindrical stud.

22. A safety razorblade liaving a clamp ing-screw receiving hole and ,a stud receiving aperture, the bla tureadapted to engage aic 'lindrical stud or a non-cylindrical stud, an thereby prevent 

